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Beginner

Passive PoE for SPA922

Hello,

I wanted to make simple PoE installation for SPA922 phone. I bought 48V adapter and connected negative

to pair 7 and 8 and positive to pair 4 and 5. But no luck, phone doesn't work, but blinks it screen when

disconnecting.

I was wondering if SPA922 supports passive PoE at all? I do not want to install PoE switch because

it is unnecessary in that location, PoE would be used only to allow wall mount of that phone.

Thanks!

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Hall of Fame Master

Passive PoE for SPA922

Phone supports 802.3af standard Poe only.

Otherwise, you can use a 5V power supply, with passive PoE splitter if you want,

Highlighted
Beginner

Passive PoE for SPA922

Hello,

Unfortunately you are not right . I used 48V power adapter and coneccted it to pairs 4,5 and 7,8 and it works. Also polarity doesn't matter. Works both ways. I just had to modify my passive PoE injector and it works just fine.

So yes - SPA 922 does support passive PoE.